Device for assembly of stair forms

Abstract

An apparatus as disclosed for making concrete forms for making stairs. A substantially planar member has a riser end and a pivot end substantially opposite the riser end and has first and second. A pivot point rotatably fixes the pivoting end to a stringer so that the riser end can pivot with respect to the pivot end. A riser support member is mounted perpendicular to the planar member adjacent the riser end and extends to each side of the planar member. A kneeboard support may be placed on both sides of the planar member so that a kneeboard may be placed between one apparatus and a corresponding apparatus on the other side of the stairs. A scale may be provided for positioning the apparatus with respect to the stringer to facilitate mounting subsequent apparatus to a given stringer. The riser support member may be slanted to provide a constant toe-in or kickback.

What is claimed is: 
     
       1. An apparatus for making concrete forms for making stairs, the apparatus comprising: a substantially planar member having a riser end and a pivot end substantially opposite the riser end and having first and second sides;   means for rotatably fixing the pivot end to a stringer so that the riser end can pivot with respect to the pivot end;   means adjacent the riser end for mounting the planar member to the stringer such that rotatably fixing the pivot end to the stringer and mounting the planar member to the stringer through the mounting means adjacent the riser end substantially fixes the planar member to the stringer;   a substantially planar riser support member defining a first plane perpendicular to the planar member, said riser support member being adjacent the riser end and comprising first and second sides extending to respective sides of the planar member a distance sufficient to allow support of a riser form by either by the first and second sides; and   a flange member extending perpendicularly from the first and second sides of the planar member and defining a second plane intersecting with said first plane such that that riser support member is on a side of the flange member opposite the means for mounting the planar member to the stringer.   
     
     
       2. The apparatus as claimed in claim 1 wherein the planar member comprises a scale on the riser end for adjusting a pivotal position of the apparatus. 
     
     
       3. The apparatus as claimed in claim 1 wherein the mounting means comprises a plurality of holes. 
     
     
       4. The apparatus as claimed in claim 2 wherein the scale is on the first and second sides. 
     
     
       5. The apparatus as claimed in claim 2 wherein the riser support member is on a lower portion of the planar member and the scale is on an upper portion of the planar member. 
     
     
       6. The apparatus as claimed in claim 1 further comprising a plumbline on the first and second sides along at least a portion of the riser end. 
     
     
       7. The apparatus as claimed in claim 6 wherein the plumbline is non-parallel with respect to the riser support member. 
     
     
       8. The apparatus as claimed in claim 1 wherein the flange member defines a line non-parallel to the riser support member for use in positioning the planar member relative to the stringer. 
     
     
       9. The apparatus as claimed in 8 wherein the line defining means comprises means extending along the first and second sides of the planar member. 
     
     
       10. The apparatus as claimed in claim 9 wherein the flange member intersects the riser support member. 
     
     
       11. The apparatus as claimed in claim 10 wherein the flange member comprises a kneeboard support. 
     
     
       12. The apparatus as claimed in claim 10 wherein the rotatably fixed means comprises rotatably fixing means formed in the planar member at a first level and wherein the flange member is at a second level below the first level. 
     
     
       13. The apparatus as claimed in claim 10 further comprising a plumbline along at least a portion of the riser end and wherein the flange member extends on two sides of the plumbline. 
     
     
       14. The apparatus as claimed in claim 1 further comprising a viewing apparatus in the planar member for viewing a line on the stringer. 
     
     
       15. The apparatus as claimed in claim 1 wherein the apparatus is a one-piece device. 
     
     
       16. An apparatus for making concrete forms for making stairs, the apparatus comprising: a substantially planar member having a riser end and a pivot end substantially opposite the riser end and having first and second sides;   means for rotatably fixing the pivot end to a stringer so that the riser end can pivot with respect to the pivot end;   a riser support member perpendicular to the planar member adjacent the riser end and extending to each side of the planar member;   a plumbline on the first and second sides along at least a portion of the riser end non-parallel with respect to the riser support member; and   means defning a line perpendicular to the plumbline and extending along the first and second sides of the planar member, wherein the line defining means comprises a kneeboard support flange member extending from the first and second sides intersecting the riser support member and wherein the kneeboard support comprises means defining a pair of holes.   
     
     
       17. An apparatus for making concrete forms for making stairs, the apparatus comprising: a substantially planar member having a riser end and a pivot end substantially opposite the riser end and having first and second sides;   means for rotatably fixing the pivot end to a stringer so that the riser end can pivot with respect to the pivot end;   a riser support member perpendicular to the planar member adjacent the riser end and extending to each side of the planar member;   a plumbline on the first and second sides along at least a portion of the riser end non-parallel with respect to the riser support member;   means defining a line perpendicular to the plumbline and extending along the first and second sides of the planar member, wherein the line defining means comprises a flange member extending from the first and second sides intersecting the riser support member, wherein the flange member extends on two sides of the plumbline; and   means defining a pair of holes in the flange member on a side of the plumbline opposite the rotatably fixing means.   
     
     
       18. An apparatus for making concrete forms for making stairs, the apparatus comprising: a substantially planar member having a riser end and a pivot end substantially opposite the riser end and having first and second sides;   means for rotatably fixing the pivot end to a stringer so that the riser end can pivot with respect to the pivot end;   a riser support member perpendicular to the planar member adjacent the riser end and extending to each side of the planar member;   a plumbline on the first and second sides along at least a portion of the riser end;   means defining a line perpendicular to the plumbline and comprising means extending along the first and second sides of the planar member, wherein the line defining means comprises a flange member extending from the first and second sides and intersecting the riser support member, and wherein the flange member comprises means defining holes extending along parallel lines which intersect the riser support member.   
     
     
       19. An apparatus for making concrete forms for making stairs, the apparatus comprising: a first member substantially defining a first plane comprising means for pivotally supporting the first member at a point on a line on a stringer and a scale for pivotally aligning the first planar member with respect to the line;   a second member substantially defining a second plane substantially perpendicular to the first plane and extending approximately equidistant on first and second sides of the first member and extending at least partly in a direction along a line defined by the pivotally supporting means and a portion of the scale; and   a third member substantially defining a third plane substantially perpendicular to the first plane and intersecting with the second plane for supporting a riser form wherein the third member is positioned such that the third member is on a side of the second member opposite the means for pivotally supporting the first member and the scale.   
     
     
       20. The apparatus as claimed in claim 19 wherein the pivotally supporting means comprises a wall defining a hole through the first member from the first to the second side. 
     
     
       21. The apparatus as claimed in claim 19 wherein the first member comprises a line formed on the first member extending in a direction substantially normal to the second member. 
     
     
       22. The apparatus as claimed in claim 19 wherein the second member comprises at least one wall defining a hole to which a top of a riser form may be fastened. 
     
     
       23. The apparatus as claimed in claim 19 wherein the second member comprises a kneeboard support. 
     
     
       24. The apparatus as claimed in claim 19 wherein the third member comprises at least one wall defining a hole through which a riser form may be fastened. 
     
     
       25. The apparatus as claimed in claim 19 wherein the third member extends on the first and second sides of the first member. 
     
     
       26. The apparatus as claimed in claim 19 wherein the second and third members intersect. 
     
     
       27. An apparatus for making concrete forms for making stairs, the apparatus comprising: a first member substantially defining a first plane comprising means for pivotally supporting the first member at a point on a line on a stringer and a scale for pivotally aligning the first planar member with respect to the line;   a second member substantially defining a second plane substantially perpendicular to the first plane and extending approximately equidistant on first and second sides of the first member and extending at least partly in a direction along a line defined by the pivotally supporting means and a portion of the scale;   a third member substantially defining a third plane substantially perpendicular to the first plane for supporting a riser form; and   wherein the second and third members intersect at an angle of less than 90°.   
     
     
       28. An apparatus for making concrete forms for making stairs, the apparatus comprising: a substantially planar member having a riser end and a pivot end substantially opposite the riser end and having first and second sides;   means for rotatably fixing the pivot end to a stringer so that the riser end can pivot with respect to the pivot end;   means adjacent the riser end for mounting the planar member to the stringer such that rotatably fixing the pivot end to the stringer and mounting the planar member to the stringer through the mounting means adjacent the riser end substantially fixes the planar member to the stringer;   a substantially planar riser support member perpendicular to the planar member adjacent the riser end and comprising first and second sides extending to respective sides of the planar member a distance sufficient to allow support of a riser form by either of the first and second sides; and   means defining a line non-parallel to the riser support member for use in positioning the planar member relative to the stringer wherein the line defining means comprises means extending along the first and second sides of the planar member and comprises a flange member extending from the first and second sides and intersecting the riser support member wherein the flange member extends a distance from a respective side of the planar member greater than the distance the corresponding side of the riser support member extends from the planar member to thereby form a ledge extending past the riser support member for accepting an edge of a framing square.   
     
     
       29. An apparatus for making stairs, the apparatus comprising: a substantially planar member having a riser end, a pivot end substantially opposite the riser end and having first and second sides;   means defining an aperture for rotatably fixing the pivot end to a stringer so that a riser end can pivot with respect to the pivot end;   means adjacent the riser end for preventing rotation of the substantially planar member when fixed to a stringer along with fixing of the pivot end, said means adjacent the riser end comprising a lower-most end;   a substantially planar riser support member perpendicular to the planar member adjacent the riser end and below a line defined by the aperture and the lower-most end and comprising first and second sides extending to respective sides of the planar member a distance to allow support of a riser form by either by the first and second sides;   a flange member extending from the first and second sides and intersecting the riser support member wherein the flange member defines a plane and the riser support member and the means for preventing rotation are substantially located on opposite sides of the plane.